CN115221711B - Accurate calculation method and device for irrigation water consumption suitable for embedded equipment - Google Patents
Accurate calculation method and device for irrigation water consumption suitable for embedded equipment Download PDFInfo
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- 239000003621 irrigation water Substances 0.000 title claims abstract description 55
- 238000004364 calculation method Methods 0.000 title claims abstract description 42
- 239000002689 soil Substances 0.000 claims abstract description 201
- 230000002262 irrigation Effects 0.000 claims abstract description 102
- 238000003973 irrigation Methods 0.000 claims abstract description 102
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- 239000004576 sand Substances 0.000 claims abstract description 22
- 239000004927 clay Substances 0.000 claims abstract description 20
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- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims description 3
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- 238000004422 calculation algorithm Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
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Abstract
The invention provides a precise calculation method and device for irrigation water consumption suitable for embedded equipment. The method comprises the following steps: setting a primary variable, wherein the primary variable refers to a parameter for representing the basic physicochemical property of soil, and comprises the sand content, clay content, organic matter content and porosity of the soil; calculating a secondary variable according to the primary variable, wherein the secondary variable is a parameter for reflecting the soil moisture characteristic; the secondary variables comprise crop wilting points, field water holding capacity, soil volume weight and soil penetration speed; determining irrigation equipment, and calculating to obtain a tertiary variable according to rated technical parameters and a secondary variable of the irrigation equipment, wherein the tertiary variable is a parameter for representing irrigation degree; the tertiary variables include irrigation water consumption, irrigation duration, irrigation intensity and irrigation depth.
Description
Technical Field
The invention relates to the technical field of agricultural water-saving irrigation, in particular to an accurate calculation method and device for irrigation water consumption suitable for embedded equipment.
Background
The current common water-saving irrigation water consumption calculation method mainly utilizes the water balance principle, and determines the irrigation water consumption according to the sensor value, future meteorological data, historical irrigation data, soil moisture content supplementing quantity, crop evaporation transpiration quantity and the like; the method mainly has the following two problems: (1) The influence of different soil on plant growth and water circulation is not fully considered (only the soil volume weight index is considered in a part of model algorithm), and even not considered; however, in water-saving irrigation, the soil composition has a decisive effect on the amount of irrigation water, for example in sandy land as opposed to clay land. The irrigation quantity calculating method only considers the soil volume weight index, and the calculation of the volume weight of the soil is easy to cause large fluctuation change of data due to the large change of the volume weight of the soil after operations such as cultivation, rainfall, irrigation, straw returning and the like, so that the accuracy of the calculation of the irrigation water consumption cannot be ensured. In this case, in order to ensure sufficient irrigation, agricultural producers typically irrigate in an over-irrigated manner. Although the method solves the problem of insufficient irrigation amount possibly caused by inaccurate model calculation, the irrigation water consumption is obviously increased after the method is used, and on one hand, excessive use of water resources is caused; on the other hand, soil nutrient fertilizer is easy to leach and migrate to a deep soil layer, so that shallow groundwater pollution is caused. (2) The method is not suitable for being deployed in an embedded system, and the control equipment cannot be guided to automatically perform irrigation operation.
Disclosure of Invention
Aiming at the problems that the traditional irrigation water consumption calculation method does not fully consider the influence of soil components and is not suitable for being deployed in an irrigation control system, the invention provides an irrigation water consumption accurate calculation method and device suitable for embedded equipment.
In one aspect, the invention provides a method for accurately calculating irrigation water consumption suitable for embedded equipment, which comprises the following steps:
setting a primary variable, wherein the primary variable refers to a parameter for representing the basic physicochemical property of soil, and comprises sand content, clay content, organic matter content and porosity of the soil;
calculating a secondary variable according to the primary variable, wherein the secondary variable is a parameter for reflecting the soil moisture characteristic; the secondary variables comprise crop wilting points, field water holding capacity, soil volume weight and soil penetration speed;
determining irrigation equipment, and calculating to obtain tertiary variables according to rated technical parameters of the irrigation equipment and the secondary variables, wherein the tertiary variables are parameters for representing irrigation degree; the tertiary variables include irrigation water consumption, irrigation duration, irrigation intensity and irrigation depth.
Further, the method further comprises the following steps: generating a four-level variable according to the three-level variable, wherein the four-level variable refers to a control parameter of the irrigation equipment, and the control parameter of the irrigation equipment is used for controlling the opening and closing of a water pump, the opening and closing of an electromagnetic valve, the power of a frequency converter and the opening and closing of the frequency converter.
Further, the formula (1) is constructed as a crop wilting point F L Is calculated according to the formula:
F L ＝θ S1 W S +θ C1 W C +θ O1 W O +θ SC1 W S W C +θ CO1 W C W O +θ SO1 W S W O +θ 1 (1)
constructing formula (2) as field water holding capacity F T Is calculated according to the formula:
F T ＝θ S2 W S +θ C2 W C +θ O2 W O +θ SC2 W S W C +θ CO2 W C W O +θ SO2 W S W O +θ 2 (2)
constructing formula (3) as saturated water content F of soil B Is calculated according to the formula:
F B ＝θ S3 W S +θ C3 W C +θ O3 W O +θ SC3 W S W C +θ CO3 W C W O +θ SO3 W S W O +θ 3 (3)
wherein W is S 、W C And W is equal to O Respectively representing the sand content, clay content and organic matter content of the soil; θ S1 、θ C1 、θ O1 、θ SC1 、θ CO1 And theta SO1 Respectively represent the adjustment coefficients theta of the corresponding soil components under the water potential of the first soil 1 Representing a soil moisture value at a first soil water potential; θ S2 、θ C2 、θ O2 、θ SC2 、θ CO2 And theta SO2 Respectively represent the adjustment coefficients, theta, of the corresponding soil components under the water potential of the second soil 2 Representing a soil moisture value at a second soil water potential; θ S3 、θ C3 、θ O3 、θ SC3 、θ CO3 And theta SO3 Respectively represent the adjustment coefficients, theta, of the corresponding soil components under the third soil water potential 3 The soil moisture value at the third soil water potential is shown.
Further, the formula (4) is constructed as a calculation formula of the soil volume weight:
ρ b ＝(αF T 2 +βF T +γF B +θW S +K 1 )P (4)
wherein F is T Representing the field water holding capacity, alpha and beta representing the calculated coefficient of the field water holding capacity, gamma representing the calculated coefficient of the saturated water content of the soil, theta representing the calculated coefficient of the sand content, K 1 To adjust the coefficient, P is a calculated coefficient of the porosity of the soil.
Further, the formula (5) is constructed as a calculation formula of the soil penetration rate V:
wherein P is the calculation coefficient of the porosity of the soil, F T Representing the field water holding capacity, wherein beta is the calculation coefficient of the field water holding capacity,
calculating coefficient K for soil volume weight 2 To adjust the coefficients.
Further, the irrigation water amount is calculated according to formulas (6) and (7):
I i ＝SHρ b (P t -P c ) (7)
wherein I is 0 For irrigation water consumption, I i Represents the irrigation water consumption of the soil at the ith layer, S is the required irrigation area of the soil at the ith layer, H is the depth of the soil at the ith layer, and ρ b P is the soil volume weight of the current soil t For the target humidity of the soil, P c Is the moisture content of the current soil moisture content.
Further, the irrigation duration T is calculated according to formula (8):
wherein I is 0 For irrigation water consumption, Q is the flow of the irrigation equipment.
Further, the irrigation intensity I is calculated according to formula (9):
I＝λ*I 0 /V (9)
wherein lambda represents irrigation intensity coefficient, I 0 For irrigation water consumption, V is soil penetration rate.
Further, the irrigation depth D is calculated according to formula (10):
wherein V is the soil penetration speed, T is the irrigation time, pc is the current soil moisture content, F B Is saturated water content.
On the other hand, the invention also provides an accurate calculation device for irrigation water consumption suitable for embedded equipment, which comprises:
the primary variable module is used for setting primary variables, wherein the primary variables refer to parameters for representing the basic physicochemical properties of the soil, and the primary variables comprise sand content, clay content, organic matter content and porosity of the soil;
the secondary variable module is used for calculating to obtain a secondary variable according to the primary variable, wherein the secondary variable is a parameter for reflecting the soil moisture characteristic; the secondary variables comprise crop wilting points, field water holding capacity, soil volume weight and soil penetration speed;
the tertiary variable module is used for obtaining tertiary variables according to rated technical parameters of given irrigation equipment and the secondary variable calculation, wherein the tertiary variables are parameters for representing irrigation degree; the tertiary variables comprise irrigation water consumption, irrigation duration, irrigation intensity and irrigation depth;
the control parameter generation module is used for generating control parameters of the irrigation equipment according to the three-level variables, wherein the control parameters of the irrigation equipment are used for controlling the opening and closing of the water pump, the opening and closing of the electromagnetic valve, the power of the frequency converter and the opening and closing of the electromagnetic valve.
The invention has the beneficial effects that:
(1) In the traditional mode, the numerical value of the soil moisture content sensor is only used as a standard for calculating the irrigation water consumption, and the huge differences of different soil qualities on wilting points, field water holding capacity and soil water holding capacity are not considered.
(2) The invention can generate the control instruction suitable for the execution of the irrigation equipment and is suitable for being embedded into an irrigation control system.
Drawings
Fig. 1 is a schematic flow chart of a method for accurately calculating irrigation water consumption suitable for embedded equipment according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an accurate calculation device for irrigation water consumption, which is suitable for embedded equipment and provided by the embodiment of the invention;
fig. 3 is a schematic workflow diagram of an accurate calculation device for irrigation water consumption suitable for embedded equipment according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a method for accurately calculating irrigation water consumption suitable for an embedded device, including:
s101: setting a primary variable, wherein the primary variable refers to a parameter for representing the basic physicochemical property of soil, and comprises sand content, clay content, organic matter content and porosity of the soil;
specifically, the sand content, clay content and organic matter content are all mass content percentages, the standard state of porosity is the state before cultivation, and the standard value is recorded as 1. Wherein, the porosity is irrelevant to the soil texture, is only relevant to the soil loosening and compaction degree, and the factors influencing the porosity parameter mainly comprise: cultivated land, rainfall, rolling, etc.
The first-level variable is mainly obtained by input of a user, such as the mass content percentage of sand, the mass content percentage of clay, the mass content percentage of organic matters and the porosity coefficient in the input soil.
In addition, in order to facilitate the user to input the soil components more quickly and accurately, in practical application, a data prefabrication model can be constructed on an application layer, different soil components are refined, and the prefabrication soil model comprises, but is not limited to, the following soil textures: sandy soil, clay, loam, clay loam, sandy clay, silt-containing silt and other textures, and the expression forms of the content of the components in different textures are listed for a user to finely adjust the soil components.
The user can determine the content of each component in the soil through different methods such as experience, soil screening, laboratory analysis and the like. Or the corresponding components are quickly input through a prefabricated soil model, and then the content conditions of the current components are finely adjusted according to the sizes of the representation forms of the content of the different soil components in the listed soil, so that the proportion of each component has higher consistency with a true value under the condition that the proportion of each component is not measured in a laboratory.
The method for calculating the variable comprises the steps of calculating the variable, wherein the variable is calculated according to the calculation result of the variable, and the variable is calculated according to the calculation result.
S102: calculating a secondary variable according to the primary variable, wherein the secondary variable is a parameter for reflecting the soil moisture characteristic; the secondary variables comprise crop wilting points, field water holding capacity, soil volume weight and soil penetration speed;
specifically, before a secondary variable quantity calculation model is built, soil water potential sensors are used for measuring the influence of different soil humidity on water potential, and specific characteristic data required for building the model are collected. According to the soil water potential, the water is defined as saturated water content water quality with the water potential of less than 10kpa, the water is 30kpa, and the water is a field water-holding capacity water potential, and the water is a permanent wilting point water potential with the water potential of 1500kpa. And constructing the soil mass water content percentages of different soil textures at saturated water content, field water holding capacity and permanent wilting point according to different soil texture contents in the soil. Wherein the soil component is based on three components of sand, clay and organic matters.
As one embodiment, the formula (1) is constructed as the crop wilting point F L Is calculated according to the formula:
F L ＝θ S1 W S +θ C1 W C +θ O1 W O +θ SC1 W S W C +θ CO1 W C W O +θ SO1 W S W O +θ 1 (1)
wherein W is S 、W C And W is equal to O Respectively representing the sand content, clay content and organic matter content of the soil; θ S1 、θ C1 、θ O1 、θ SC1 、θ CO1 And theta SO1 Respectively represent the adjustment coefficients theta of the corresponding soil components under the water potential of the first soil 1 The soil moisture value at the first soil water potential is represented. In the embodiment of the invention, the water potential of the first soil is 1500Kpa.
Constructing formula (2) as field water holding capacity F T Is calculated according to the formula:
F T ＝θ S2 W S +θ C2 W C +θ O2 W O +θ SC2 W S W C +θ CO2 W C W O +θ SO2 W S W O +θ 2 (2)
wherein W is S 、W C And W is equal to O Respectively representing the sand content, clay content and organic matter content of the soil; θ S2 、θ C2 、θ O2 、θ SC2 、θ CO2 And theta SO2 Respectively represent the adjustment coefficients, theta, of the corresponding soil components under the water potential of the second soil 2 The soil moisture value at the second soil water potential is represented. In the embodiment of the invention, the water potential of the second soil is 30KPa.
Constructing formula (3) as saturated water content F of soil B Is calculated according to the formula:
F B ＝θ S3 W S +θ C3 W C +θ O3 W O +θ SC3 W S W C +θ CO3 W C W O +θ SO3 W S W O +θ 3 (3)
wherein W is S 、W C And W is equal to O Respectively representing the sand content, clay content and organic matter content of the soil; θ S3 、θ C3 、θ O3 、θ SC3 、θ CO3 And theta SO3 Respectively represent the adjustment coefficients, theta, of the corresponding soil components under the third soil water potential 3 The soil moisture value at the third soil water potential is shown. In the embodiment of the invention, the water potential of the third soil is 10KPa.
Constructing a formula (4) as a calculation formula of the soil volume weight:
ρ b ＝(αF T 2 +βF T +γF B +θW S +K 1 )P (4)
wherein F is T Representing the field water holding capacity, alpha and beta representing the calculated coefficient of the field water holding capacity, gamma representing the calculated coefficient of the saturated water content of the soil, theta representing the calculated coefficient of the sand content, K 1 To adjust the coefficient, P is a calculated coefficient of the porosity of the soil.
Constructing a formula (5) as a calculation formula of the soil penetration speed V:
wherein P is the calculation coefficient of the porosity of the soil, F T Representing the field water holding capacity, wherein beta is the calculation coefficient of the field water holding capacity,
calculating coefficient K for soil volume weight 2 To adjust the coefficients.
S103: determining irrigation equipment, and calculating to obtain tertiary variables according to rated technical parameters of the irrigation equipment and the secondary variables, wherein the tertiary variables are parameters for representing irrigation degree; the tertiary variables comprise irrigation water consumption, irrigation duration, irrigation intensity and irrigation depth;
specifically, the irrigation water amount is calculated according to formulas (6) and (7):
I i ＝SHρ b (P t -P c ) (7)
wherein I is 0 For irrigation water consumption, I i Represents the irrigation water consumption of the soil at the ith layer, S is the required irrigation area of the soil at the ith layer, H is the depth of the soil at the ith layer, and ρ b P is the soil volume weight of the current soil t For the target humidity of the soil, P c Can be used for measuring the moisture content of the soil moisture content at present by a sensorCollecting.
In addition, the main source of the soil target humidity is determined according to related standards such as national standard and landmark of water-saving irrigation or according to the optimum value of crop growth, and if the soil target humidity is the relative water content of the soil, the following formula is used for conversion:
P t ＝F B R t
in the above, F B Is saturated with water content, R t Is a recommended value for the relative moisture content.
Calculating irrigation duration T according to a formula (8):
wherein I is 0 For irrigation water consumption, Q is the flow of the irrigation equipment.
Calculating the irrigation intensity I, also called optimal irrigation flow rate, according to the formula (9):
I＝λ*I 0 /V (9)
wherein lambda represents irrigation intensity coefficient, I 0 For irrigation water consumption, V is soil penetration rate.
Specifically, the irrigation intensity I mainly indicates the irrigation flow rate during irrigation, if the flow rate is too high, surface runoff is easy to generate, and the effect of water-saving irrigation cannot be achieved; if the flow is too small during irrigation, the irrigation time is too long, and the irrigation efficiency is affected. In the embodiment of the invention, the value range of lambda is generally selected to be 1.2-1.5.
Calculating irrigation depth D according to formula (10):
wherein V is the soil penetration speed, T is the irrigation time, pc is the current soil moisture content, F B Is saturated water content.
According to the accurate calculation method for the irrigation water consumption, modeling is carried out according to the relation between the soil components and the water consumption, the model of the influence of different components on the soil irrigation water consumption is constructed, and the calculation accuracy of the irrigation water consumption is greatly improved.
The method provided by the invention only calculates the irrigation quantity and other parameters under the current soil moisture content, and does not consider external data such as future rainfall.
Example 2
On the basis of the above embodiment, as shown in fig. 1, in order to further implement intelligent operation of irrigation operation, an embodiment of the present invention further includes step S104:
s104: generating a four-level variable according to the three-level variable, wherein the four-level variable refers to a control parameter of the irrigation equipment, and the control parameter of the irrigation equipment is used for controlling the opening and closing of a water pump, the opening and closing of an electromagnetic valve, the power of a frequency converter and the opening and closing of the frequency converter.
Specifically, the water pump is generally a direct control type water pump and a frequency converter control water pump, and according to the difference of the land block size and the soil type of irrigation operation, the system operates the opening or closing of equipment such as the water pump, the frequency converter, the electromagnetic valve and the like according to control parameters, so that intelligent operation of the irrigation operation is realized.
Example 3
As shown in fig. 2, an embodiment of the present invention provides an accurate calculation device for irrigation water consumption suitable for an embedded device, including: the system comprises a first-level variable module, a second-level variable module, a third-level variable module and a fourth-level variable module;
the primary variable module is used for setting primary variables, wherein the primary variables refer to parameters for representing basic physicochemical properties of soil, and the primary variables comprise sand content, clay content, organic matter content and porosity of the soil. The secondary variable module is used for calculating to obtain a secondary variable according to the primary variable, wherein the secondary variable is a parameter for reflecting the soil moisture characteristic; the secondary variables comprise crop wilting points, field water holding capacity, soil volume weight and soil penetration speed. The tertiary variable module is used for obtaining tertiary variables according to rated technical parameters of given irrigation equipment and the secondary variable calculation, wherein the tertiary variables are parameters used for representing irrigation degree; the tertiary variables include irrigation water consumption, irrigation duration, irrigation intensity and irrigation depth. The four-stage variable module is used for generating four-stage variables according to the three-stage variables, the four-stage variables refer to control parameters of irrigation equipment, the control parameters of the irrigation equipment are used for controlling the opening and closing of a water pump, the opening and closing of an electromagnetic valve, and the power and the opening and closing of a frequency converter.
Specifically, after the device operates, the secondary variables such as the soil volume weight and the like are calculated according to the soil component information, the calculated secondary variables are stored in the device, and the soil component parameters can be directly used without modification. As shown in figure 3, when irrigation operation is started every time, the device generates three-level variables with guiding significance by combining the values of the current soil moisture content sensor with the two-level variables. The third-level variable belongs to a target variable and mainly indicates that the system irrigates a target and can not directly operate irrigation equipment, so that on the basis of the third-level variable, a fourth-level variable of the operable irrigation equipment is generated by combining information of user data (including land block information and parameter information of the irrigation equipment), and whether irrigation operation is ended is judged by monitoring whether the state of the device reaches the fourth-level variable parameter value or not.
It should be noted that, the precise calculating device for irrigation water consumption suitable for an embedded device provided by the embodiment of the present invention is for implementing the above method embodiment, and the function thereof may specifically refer to the above method embodiment and is not repeated herein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. An accurate calculation method of irrigation water consumption suitable for embedded equipment is characterized by comprising the following steps:
setting a primary variable, wherein the primary variable refers to a parameter for representing the basic physicochemical property of soil, and comprises sand content, clay content, organic matter content and porosity of the soil;
calculating a secondary variable according to the primary variable, wherein the secondary variable is a parameter for reflecting the soil moisture characteristic; the secondary variables comprise crop wilting points, field water holding capacity, soil volume weight and soil penetration speed; constructing formula (1) as crop wilting point F L Is calculated according to the formula:
F L ＝θ S1 W S +θ C1 W C +θ O1 W O +θ SC1 W S W C +θ CO1 W C W O +θ SO1 W S W O +θ 1 (1)
constructing formula (2) as field water holding capacity F T Is calculated according to the formula:
F T ＝θ S2 W S +θ C2 W C +θ O2 W O +θ SC2 W S W C +θ CO2 W C W O +θ SO2 W S W O +θ 2 (2)
constructing formula (3) as saturated water content F of soil B Is calculated according to the formula:
F B ＝θ S3 W S +θ C3 W C +θ O3 W O +θ SC3 W S W C +θ CO3 W C W O +θ SO3 W S W O +θ 3 (3)
wherein W is S 、W C And W is equal to O Respectively representing the sand content, clay content and organic matter content of the soil; θ S1 、θ C1 、θ O1 、θ SC1 、θ CO1 And theta SO1 Respectively represent the adjustment coefficients theta of the corresponding soil components under the water potential of the first soil 1 Representing a soil moisture value at a first soil water potential; θ S2 、θ C2 、θ O2 、θ SC2 、θ CO2 And theta SO2 Respectively represent the adjustment coefficients, theta, of the corresponding soil components under the water potential of the second soil 2 Representing a soil moisture value at a second soil water potential; θ S3 、θ C3 、θ O3 、θ SC3 、θ CO3 And theta SO3 Respectively represent the adjustment coefficients, theta, of the corresponding soil components under the third soil water potential 3 Representing a soil moisture value at a third soil water potential;
constructing a formula (4) as a calculation formula of the soil volume weight:
ρ b ＝(αF T 2 +βF T +γF B +θW S +K 1 )P (4)
wherein F is T Representing the field water holding capacity, F B Represents saturated water content, W S The sand content of the soil is represented, alpha and beta represent calculated coefficients of field water holding capacity, gamma represents calculated coefficients of saturated water content, theta represents calculated coefficients of sand content, K 1 For adjusting the coefficient, P is the calculation coefficient of the porosity of the soil;
determining irrigation equipment, and calculating to obtain tertiary variables according to rated technical parameters of the irrigation equipment and the secondary variables, wherein the tertiary variables are parameters for representing irrigation degree; the tertiary variables comprise irrigation water consumption, irrigation duration, irrigation intensity and irrigation depth;
calculating the irrigation water consumption according to formulas (6) and (7):
I i ＝SHρ b (P t -P c ) (7)
wherein I is 0 For irrigation water consumption, I i Represents the irrigation water consumption of the soil at the ith layer, S is the required irrigation area of the soil at the ith layer, H is the depth of the soil at the ith layer, and ρ b P is the soil volume weight of the current soil t For the target humidity of the soil, P c Is the moisture content of the current soil moisture content.
2. The precise calculation method for the irrigation water consumption suitable for embedded equipment according to claim 1, further comprising: generating a four-level variable according to the three-level variable, wherein the four-level variable refers to a control parameter of the irrigation equipment, and the control parameter of the irrigation equipment is used for controlling the opening and closing of a water pump, the opening and closing of an electromagnetic valve, the power of a frequency converter and the opening and closing of the frequency converter.
3. The precise calculation method of the irrigation water consumption suitable for the embedded equipment according to claim 1, wherein a formula (5) is constructed as a calculation formula of the soil penetration rate V:
V＝(φρ b +βF T +K 2 )P (5)
wherein P is the calculation coefficient of the porosity of the soil, F T Representing the field water holding capacity, wherein beta is the calculation coefficient of the field water holding capacity,
calculating coefficient K for soil volume weight 2 To adjust the coefficients.
4. The precise calculation method of the irrigation water consumption suitable for the embedded equipment according to claim 1, wherein the irrigation duration T is calculated according to a formula (8):
wherein I is 0 For irrigation water consumption, Q is the flow of the irrigation equipment.
5. The precise calculation method of the irrigation water consumption suitable for the embedded equipment according to claim 1, wherein the irrigation intensity I is calculated according to a formula (9):
I＝λ*I 0 /V (9)
wherein lambda represents irrigation intensity coefficient, I 0 For irrigation water consumption, V is soil penetration rate.
6. The precise calculation method for the irrigation water consumption suitable for the embedded equipment according to claim 1, wherein the irrigation depth D is calculated according to a formula (10):
wherein V is the soil penetration speed, T is the irrigation time, pc is the current soil moisture content, F B Is saturated water content.
7. Accurate computing arrangement of irrigation water consumption suitable for embedded equipment, its characterized in that includes:
the primary variable module is used for setting primary variables, wherein the primary variables refer to parameters for representing the basic physicochemical properties of the soil, and the primary variables comprise sand content, clay content, organic matter content and porosity of the soil;
the secondary variable module is used for calculating to obtain a secondary variable according to the primary variable, wherein the secondary variable is a parameter for reflecting the soil moisture characteristic; the secondary variables comprise crop wilting points, field water holding capacity, soil volume weight and soil penetration speed; the method is particularly used for:
constructing formula (1) as crop wilting point F L Is calculated according to the formula:
F L ＝θ S1 W S +θ C1 W C +θ O1 W O +θ SC1 W S W C +θ CO1 W C W O +θ SO1 W S W O +θ 1 (1)
constructing formula (2) as field water holding capacity F T Is calculated according to the formula:
F T ＝θ S2 W S +θ C2 W C +θ O2 W O +θ SC2 W S W C +θ CO2 W C W O +θ SO2 W S W O +θ 2 (2)
constructing formula (3) as saturated water content F of soil B Is calculated according to the formula:
F B ＝θ S3 W S +θ C3 W C +θ O3 W O +θ SC3 W S W C +θ CO3 W C W O +θ SO3 W S W O +θ 3 (3)
wherein W is S 、W C And W is equal to O Respectively representing the sand content, clay content and organic matter content of the soil; θ S1 、θ C1 、θ O1 、θ SC1 、θ CO1 And theta SO1 Respectively represent the adjustment coefficients theta of the corresponding soil components under the water potential of the first soil 1 Representing a soil moisture value at a first soil water potential; θ S2 、θ C2 、θ O2 、θ SC2 、θ CO2 And theta SO2 Respectively represent the adjustment coefficients, theta, of the corresponding soil components under the water potential of the second soil 2 Representing a soil moisture value at a second soil water potential; θ S3 、θ C3 、θ O3 、θ SC3 、θ CO3 And theta SO3 Respectively represent the adjustment coefficients, theta, of the corresponding soil components under the third soil water potential 3 Representing a soil moisture value at a third soil water potential;
constructing a formula (4) as a calculation formula of the soil volume weight:
ρ b ＝(αF T 2 +βF T +γF B +θW S +K 1 )P (4)
wherein F is T Representing the field water holding capacity, F B Represents saturated water content, W S The sand content of the soil is represented, alpha and beta represent calculated coefficients of field water holding capacity, gamma represents calculated coefficients of saturated water content, theta represents calculated coefficients of sand content, K 1 For adjusting the coefficient, P is the calculation coefficient of the porosity of the soil;
the tertiary variable module is used for obtaining tertiary variables according to rated technical parameters of given irrigation equipment and the secondary variable calculation, wherein the tertiary variables are parameters for representing irrigation degree; the tertiary variables comprise irrigation water consumption, irrigation duration, irrigation intensity and irrigation depth; the method is particularly used for:
calculating the irrigation water consumption according to formulas (6) and (7):
I i ＝SHρ b (P t -P c ) (7)
wherein I is 0 For irrigation water consumption, I i Represents the irrigation water consumption of the soil at the ith layer, S is the required irrigation area of the soil at the ith layer, H is the depth of the soil at the ith layer, and ρ b P is the soil volume weight of the current soil t For the target humidity of the soil, P c The soil moisture content is the current soil moisture content;
the control parameter generation module is used for generating control parameters of the irrigation equipment according to the three-level variables, wherein the control parameters of the irrigation equipment are used for controlling the opening and closing of the water pump, the opening and closing of the electromagnetic valve, the power of the frequency converter and the opening and closing of the electromagnetic valve.
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